<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>网格布局-间距</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        .box {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
             /* 列间距 */
            /* grid-column-gap: 10px; */
            /* 行间距 */
            /* grid-row-gap: 10px;  */
            /* 网格间距 */
            gap: 10px; 
        }
        .item {
            background-color: #4CAF50;
            color: white;
            text-align: center;
            padding: 20px;
            font-size: 30px;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="item">1</div>
        <div class="item">2</div>
        <div class="item">3</div>
        <div class="item">4</div>
        <div class="item">5</div>
        <div class="item">6</div>
        <div class="item">7</div>
        <div class="item">8</div>
        <div class="item">9</div>
    </div>
</body>
</html>